mrmBot-Matrix/natives/motivate.cc

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#include <vips/vips8>
#include "common.h"
using namespace std;
using namespace vips;
ArgumentMap Motivate(string type, string *outType, char *BufferData,
size_t BufferLength, ArgumentMap Arguments, size_t *DataSize) {
string top_text = GetArgument<string>(Arguments, "top");
string bottom_text = GetArgument<string>(Arguments, "bottom");
string font = GetArgument<string>(Arguments, "font");
string basePath = GetArgument<string>(Arguments, "basePath");
VOption *options = VImage::option()->set("access", "sequential");
VImage in =
VImage::new_from_buffer(BufferData, BufferLength, "",
type == "gif" ? options->set("n", -1) : options)
.colourspace(VIPS_INTERPRETATION_sRGB);
if (!in.has_alpha()) in = in.bandjoin(255);
int width = in.width();
int size = width / 5;
int pageHeight = vips_image_get_page_height(in.get_image());
int nPages = vips_image_get_n_pages(in.get_image());
int textWidth = width - ((width / 25) * 2);
string font_string =
(font == "roboto" ? "Roboto Condensed" : font) + ", Twemoji Color Font";
auto findResult = fontPaths.find(font);
if (findResult != fontPaths.end()) {
VImage::text(".", VImage::option()->set(
"fontfile", (basePath + findResult->second).c_str()));
}
VImage topImage;
if (top_text != "") {
string topText = "<span foreground=\"white\" background=\"black\">" +
top_text + "</span>";
topImage = VImage::text(
topText.c_str(),
VImage::option()
->set("rgba", true)
->set("align", VIPS_ALIGN_CENTRE)
->set("font", (font_string + " " + to_string(size)).c_str())
->set("fontfile", (basePath + "assets/fonts/twemoji.otf").c_str())
->set("width", textWidth));
}
VImage bottomImage;
if (bottom_text != "") {
string bottomText = "<span foreground=\"white\" background=\"black\">" +
bottom_text + "</span>";
bottomImage = VImage::text(
bottomText.c_str(),
VImage::option()
->set("rgba", true)
->set("align", VIPS_ALIGN_CENTRE)
->set("font", (font_string + " " + to_string(size * 0.4)).c_str())
->set("fontfile", (basePath + "assets/fonts/twemoji.otf").c_str())
->set("width", textWidth));
}
vector<VImage> img;
int height;
for (int i = 0; i < nPages; i++) {
VImage img_frame =
type == "gif" ? in.crop(0, i * pageHeight, width, pageHeight) : in;
int borderSize = max(2, width / 66);
int borderSize2 = borderSize * 0.5;
VImage bordered =
img_frame.embed(borderSize, borderSize, width + (borderSize * 2),
pageHeight + (borderSize * 2),
VImage::option()->set("extend", "black"));
VImage bordered2 = bordered.embed(borderSize2, borderSize2,
bordered.width() + (borderSize2 * 2),
bordered.height() + (borderSize2 * 2),
VImage::option()->set("extend", "white"));
int addition = width / 8;
int sideAddition = pageHeight * 0.4;
VImage bordered3 = bordered2.embed(
sideAddition / 2, addition / 2, bordered2.width() + sideAddition,
bordered2.height() + addition,
VImage::option()->set("extend", "black"));
VImage frame;
if (top_text != "") {
frame = bordered3.join(
topImage.gravity(VIPS_COMPASS_DIRECTION_NORTH, bordered3.width(),
topImage.height() + (size / 4),
VImage::option()->set("extend", "black")),
VIPS_DIRECTION_VERTICAL,
VImage::option()->set("background", 0x000000)->set("expand", true));
}
if (bottom_text != "") {
if (top_text == "") frame = bordered3;
frame = frame.join(
bottomImage.gravity(VIPS_COMPASS_DIRECTION_NORTH, bordered3.width(),
bottomImage.height() + (size / 4),
VImage::option()->set("extend", "black")),
VIPS_DIRECTION_VERTICAL,
VImage::option()->set("background", 0x000000)->set("expand", true));
}
height = frame.height();
img.push_back(frame);
}
VImage final = VImage::arrayjoin(img, VImage::option()->set("across", 1))
.extract_band(0, VImage::option()->set("n", 3));
final.set(VIPS_META_PAGE_HEIGHT, height);
void *buf;
final.write_to_buffer(
("." + *outType).c_str(), &buf, DataSize,
*outType == "gif" ? VImage::option()->set("dither", 1) : 0);
ArgumentMap output;
output["buf"] = (char *)buf;
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output["width"] = final.width();
output["height"] = vips_image_get_page_height(final.get_image());
return output;
}